Connecting eSATA Drives Directly to an Ethernet Hub

I have seven drives with USB and eSATA ports. Currently, I’m connecting them to my network using a USB hub, but I assume they’d be much faster if they were connected via ESATA directly to the ethernet hub. Is there such a thing as an eSATA-to-ethernet hub?

I’ve tried Google, but it doesn’t seem to deliver relevant links.

There is. It’s called a file server

Network-attached storage, actually.